IP-622
600 MW storage in Malheur, OR · In queue since October 2021 · Proposed COD August 2028
600 MW
Capacity
1
Components
Other Storage
4y 7m
In Queue
IA Executed
IA Status
Signed May 2023
Queue → IA
1y 7m
IA → COD
5y 3m
Total Duration
1y 7m
Interconnection request submitted to ISO/RTO
Project undergoes interconnection studies to assess grid impact.
Typical: 18–36 months
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2028-08-31
IP-622 is a proposed 600 MW battery storage project located in Malheur County, Oregon. The project, developed by Owyhee Energy Storage, LLC, is interconnected to Idaho Power Company via the HMWY_x0013_SMLK 500kV Line. It consists entirely of "Other Storage" technology.
The project is listed in the IP interconnection queue as entry IP-622, with a queue entry date of October 18, 2021, and a proposed commercial operation date of August 31, 2028. The Interconnection Agreement (IA) was executed on May 1, 2023. The project has been mentioned in recent news coverage.
Generated from interconnection queue and public data sources
State
OR
County
Malheur
Grid Region
Mountain West
Market
—
Developer
Owyhee Energy Storage, LLC
Utility
Idaho Power Company
Entity
IP
Service Type
—
Point of Interconnection
HMWY_x0013_SMLK 500kV Line
Data Source
LBNL
- ISO / RTO
- MOUNTAIN_WEST
- Trading Hub
- MID-C
- Hub Confidence
- UNKNOWN
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
Last updated 2026-03-26
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